US 12,455,435 B2
Lens element, imaging lens assembly, camera module and electronic device
Chun-Hua Tsai, Taichung (TW); and Lin-An Chang, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Jan. 13, 2023, as Appl. No. 18/154,079.
Claims priority of application No. 111107139 (TW), filed on Feb. 25, 2022.
Prior Publication US 2023/0296863 A1, Sep. 21, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 1/04 (2006.01); G02B 3/04 (2006.01); G02B 7/02 (2021.01); H04N 23/55 (2023.01)
CPC G02B 13/0045 (2013.01) [G02B 1/041 (2013.01); G02B 3/04 (2013.01); G02B 7/021 (2013.01); H04N 23/55 (2023.01)] 25 Claims
OG exemplary drawing
 
1. A lens element, having a central axis, and comprising:
an optical effective portion, the central axis passing through the optical effective portion, and comprising:
a first optical surface; and
a second optical surface, the second optical surface and the first optical surface disposed relative to each other;
a peripheral portion surrounding the optical effective portion, and comprising:
a first peripheral surface, the first peripheral surface and the first optical surface facing towards the same side;
a second peripheral surface, the second peripheral surface and the second optical surface facing towards the same side; and
an outer annular surface connected to the first peripheral surface and the second peripheral surface; and
a plurality of protruding structures disposed on the first peripheral surface, the protruding structures extending along a spiral path and disposed at intervals, and the spiral path surrounding the optical effective portion and tapered towards the central axis;
wherein a first one of the protruding structures on the spiral path is a first protruding structure, and a last one of the protruding structures on the spiral path is a last protruding structure;
wherein a distance between the first protruding structure and the central axis is DS, a distance between the last protruding structure and the central axis is DE, and the following condition is satisfied:
0.005 mm<DS−DE<1 mm.
 
14. A lens element, having a central axis, and comprising:
an optical effective portion, comprising:
a first optical surface; and
a second optical surface, the second optical surface and the first optical surface disposed relative to each other;
a peripheral portion surrounding the optical effective portion, and comprising:
a first peripheral surface, the first peripheral surface and the first optical surface facing towards the same side;
a second peripheral surface, the second peripheral surface and the second optical surface facing towards the same side; and
an outer annular surface connected to the first peripheral surface and the second peripheral surface; and
a plurality of protruding structures disposed on the first peripheral surface, the protruding structures extending along a spiral path and disposed at intervals, and the spiral path surrounding the optical effective portion and tapered towards the central axis;
wherein each of at least three of the protruding structures has a first identification end and a second identification end on a cross section vertical to the first peripheral surface, each of the first identification ends is connected to the first peripheral surface, and a spacing distance is between each of the second identification ends and the first peripheral surface;
wherein an angle is formed between a side of each of the protruding structures at the second identification end and the first peripheral surface, the angle is α, and the following condition is satisfied:
45 degrees≤α≤90 degrees.